Method of making bearings



y 1933. w. H. KLOCKE 1,906,273

METHOD OF MAKING BEARINGS Original Filed Dec/28, 1928 n91. v 4 i692.

INV ENTOR. 5 CUE'ZZz'am fliocfie A TTORNEYS.

Patented May 2, I933 UNITED STATES PATENT OFFICE WILLIAM H. KLOOK'E, OFWOODHAVEN, NEW YORK, ASSIGNOB TO THE CLEVELAND GRAPHITE BRONZE COMPANY,OF CLEVELAND, OHIO, A CORPORATION OF OHIO K union or MAKING lemmasApplication filed December 28, 1928, Serial No. 328,967. Renewed August24, 1932.

The present invention, relating, as indicated, to a bearing and methodof making same is particularly directed to a new and improved method ofmanufacturing cylindrical shells from fiat stock where either thematerial employed is particularly stiif and unyielding either by reasonof its thickness or its composition, or where the thickness of the stockis high with respect to the diameter of the shell to be formed. Theprincipal object of the invention is the provision of a method which maybe employed on relatively thick stock where it is extremely diflicult toform the 'stock in the manner described in my Patent No. 1,691,073,issued November 13,

To the accomplishment of the foregoing and related ends, said invention,then, conshowing the blank after the initial forming sists ofthe meansand steps hereinafter fully described and particularly pointed out inthe claims, the annexed drawing and the following description settingforth in detail certain means and one mode of carrying out theinvention, such disclosed means and mode illustrating, however, but oneof various ways in whidch the principle of the invention may be use s Insaid annexed drawing V Fig. 1 is a side elevation of a blank cut fromflat stock from which a, cylindrical shell'is to be formed; Fig. 2 is asimilar view operation; Fig. '3 is a similar. view showing the blankafter the second forming operation; Fig. 4 is a transverse sectionalview'showing V dies employed for forming the blank of Fig. 3

7 into a cylindrical shell; Fig. 5 is a similar view showing the shellas just prior to being completed and formed; Fig. 6 is a similar A viewshowing the shellafter completion.

In my patent referred to above I form Jstripsof flat stock intocylindrical shells by initially bending the ends of the blanks to aslight curvature, after which the blank is formed into approximatelyU-shape and is then bent into a complete cylinder in one or more finalforming operations. The method there described is entirely successfulwhen applied to flat stock of the thickness usually used and also torelatively thick stock where the diameter of the shell is considerablewith respect to the thickness of the blank. It requires, however,extremely heavy power to successfully carry out that method when used onthick blanks or where the blanks are to be formed into shells of smalldiameter, due of course to the extremely short leverage which isobtained in bending, the end portions of the metal to the desiredcurvature. The pres ent invention consists in a modification of themethod previously described and is particu larly adapted to theformation of heavy thick blanks. As applied to this type of stock itrequires considerably less power than with previous methods.

In the present method I employ a rectangular blank 1- of such materialas steel, al-

though other metal may also be employed,

and initially bend the ends 2 and 3 of this ,blank away from the planeof the blank "at angles, while leaving the bent-up ends relatively-straiht. The blankis then bent between suita le dies into the U-shape formshown in Fig. 3, and during operation the ends 2and 3 are unchanged'andproject upwardly in a straight or flat condition. 4 In'the final formingof the blank into a shell, which is illustrated in 4 and 5 the U-shapedblank 5 is lacedin suitable dies 6 having a semi-cylin 'cal recesstherein in the position shown, and the npperiends 1 of the blank arethen" forced inwardlyjby means of'a second similar and complemen tarydie 7 a semi-cylindrical recess 8 therein. As thedies approach eachother the walls of the recess-8 in the upper dieengage against thestraight ends of the blank 5 and act, first, to seat-the blankfirmly'in'the lower die and to then bend the blank toward each otheruntil they meet as 7 straight ends of the shown in Fig. 5, after whichfurther movement of the dies causes a crumpling of the metal in thestraight portions upwardly into engagement with the walls of the upperdie and a flowing of the metal in these ends toward each other toproduce a fluid-tight joint 9 in the final shell 10 (see Fig. 6).

In order to prevent undue wear on the engaging wall of the upper die bythe ends of the straight portions 2 and 3 of the blank the outer edges11 and 12 of the blank may be initially rounded very slightly as shownin Fig. 4 in order to avoid the abrasive action of the sharp edge on theinclined surface of the die. Only the extreme edge should have to betaken off as otherwise a recess may be. produced at the butt in thefinal shell, which of course reduces the wall thickness across the buttand detracts from the tightness of this joint against leakage during thesubsequent operation of casting bearing metal under pressure against theinterior of the shell to form a bearing lining therefor.

Other forms may be employed embodying the features of my inventioninstead of the one here explained, change being made .in the'form orconstruction, provided the elements stated by any of the followingclaims or the equivalent of such stated elements be employed, whetherproduced by my preferred method or by others embodying steps equivalentto those stated in the following claims.

I therefore particularly point out and distinctly claim as myinvention 1. In a method of making lined bearings, the steps whichconsist in bending the end portions of a rectangular blank along a sharpline and away from the plane thereof while maintaining such end portionsin a straight flat condition,.forming said blank into substantiallyU-shape and then forming such U-shaped blank into a cylindrical shell byapplymg pressure and forcing the straight ends of said blank intoengagement with each other, and then increasing said pressure andforcing said ends radially outward to produce a fluid-tight joint acrossthe butt thus formed.

such U-shaped blank into a cylindrical shell by forcing the straightends of said blank into engagement with each other and then radiallyoutward to produce a fluid-tight joint across the butt thus formed.

Signed by me, this 22nd day of December,

WILLIAM H. KLOCKE.

2. In a method of making lined bearings,

the steps which consist in bending the-end portions of a rectangularblank along a sharp line and away from the plane thereof whilemaintaining such end portions in a straight flat condition, forming saidblank into substantially U-shape, then forming

